Elaine--Thanks for noting the asymmetric tables.
There a very important subtlety going on with the asymmetric commuter
flow tables that makes their utility extra important to look at and
consider. As many of you know we are having considerable issues with
the confidentiality and disclosure rules being imposed on the ACS data.
Even I have come to realize that the rules are not ever going to go
away. For the commuter flow tables many of the rules center on having
more than a minimum number of "unweighted" observations in each O-D
pair. Although these rules do not have that big of an effect on large
geography they do have a dramatic affect on the small area data as we
witnessed with the 2000 CTPP Part 3 tables.
To help potentially overcome the elimination of some more important flow
tables as we begin to talk about data tables for smaller areas,
asymmetric tables just might be a very practical answer. In the past
the idea of asymmetric table has been balked at but if these tables
prove useful and easy enough to produce by the Census Bureau, we could
be opening up a very promising door. So give these tables, when they
come out at the end of the summer, some special attention and consider
how they can work for analysis that you might be doing.
Elaine.Murakami(a)dot.gov wrote:
Hi Vince -- Thanks for posting the call for
abstracts!
The first CTPP data using the American Community Survey (2006-2008) is
expected to be released in September 2010. This release is limited to
geographic units with population greater than 20,000, so many counties
and places (cities and towns) are not included, and there are no small
area (tract and TAZ) tabulations in this set.
As with previous CTPP, there are 3 parts:
Part 1 - residence
Part 2 - workplace
Part 3 - flow between home and work
Despite the lack of complete geographic coverage, we hope that people
will be able to use the data for many transportation applications that
will be addressed at the conference. Also, for the first time, there
will be asymmetric flows, for example, County of Residence to Place of
Work, and PUMA of residence to Place of Work.
For a complete list of the CTPP tables, please go to:
http://www.fhwa.dot.gov/ctpp/acsdataprod.htm
Hope this list will help people think about how they can use the new
CTPP and prepare abstracts.
Also, the CTPP Oversight Board is planning to have a TRB conference on
Census data and transportation planning. No date has been set, but it
might be in the Fall of 2011. So, if you don't have a
paper/presentation ready for May 2011 in Reno, you will have another
opportunity to discuss use of the new CTPP and
issues/problems/recommendations for improvements.
Elaine Murakami
FHWA Office of Planning
206-220-4460 (in Seattle)
-----Original Message-----
From: ctpp-news-bounces(a)chrispy.net
[mailto:ctpp-news-bounces@chrispy.net] On Behalf Of Bernardin, Jr.,
Vincent
Sent: Tuesday, May 25, 2010 7:08 AM
To: ctpp-news(a)chrispy.net
Subject: [CTPP] Invitation and Call for Abstracts - 2011 TRB
PlanningApplications Conference
Greetings to all CTPP-lovers out there!
On behalf of TRB's Planning Applications Committee (ADB50) I would like
to announce the 13th TRB National Transportation Planning Applications
Conference and invite you all to seriously consider submitting an
abstract for a presentation.
I apologize for cross-posting if you have already received this through
another source, but we want to extend a broad invitation to all
transportation planners, and I thought CTPP users should be prime
candidates for some good presentations.
The conference will be held next spring in beautiful Reno, Nevada, "The
Biggest Little City in the World," from May 8-12 of 2011. The
conference website (
www.trb-appcon.org) is now up and will be updated as
more details become available.
The focus of the whole conference is on planning applications - on
planning practice rather than pure theory - so cutting-edge research is
not required (although it's welcome, too). If you have a favorite or
interesting project that you like to bore your spouse and children with
- we're the folks who really want to hear about it! The conference is
intended to be a chance for transportation planners (and modelers,
engineers, etc.) from around the country and abroad to get together and
learn from each other by sharing their experiences - so please consider
joining us to share yours!
The call for abstracts is attached. Abstracts for presentations in 16
topic areas have been specifically solicited but abstracts on any
transportation planning topic are welcome. All abstracts are due by
September 15, 2010. The abstracts are limited to 350 words and can be
submitted online at the conference website (
www.trb-appcon.org). Please
feel free to contact me with any questions.
The success of the conference depends on planners and engineers like
you. I hope to see you and your presentation in Reno in 2011!
Best,
Vince
Vince Bernardin, Jr., Ph.D.
Chief of Transportation Modeling
Bernardin, Lochmueller & Associates, Inc.
6200 Vogel Road
Evansville, IN 47715
812.479.6200
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FHWA Resource Center Planning Team
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